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Front axles issue

Old 10-22-2018, 09:29 PM
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Default Front axles issue

2011 f150 4x4 limited. So I noticed today that my front axles are still spinning will the truck is in 2wd. I put a vacuum gauge on the line going down to the hubs and it held at 25 no problem and the vacuum port off the solenoid pulled 25.5 at idle. So I put the truck on jack stands, pull the vacuum line and manually give it vacuum and I can hear the actuators unlock. Grab the tires and they spin freely. Reconnect the vacuum line back the the solenoid start the truck and they spin free again. Put the truck back on the ground start it up and put it in drive axles once again are moving in 2wd. I have read a bunch of stuff and tried a bunch, but I'm still having this issue. To add to it there is no grinding noises. Any ideas?
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Old 10-23-2018, 07:52 AM
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How much vacuum did you give it manually? Did you blow out the lines to see if you had any water inside. I've heard of the hubs staying engaged due to corrosion from water/condensation in the lines. Maybe you happened to give it just enough vacuum manually to break them free. Just a thought.
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Old 10-23-2018, 02:48 PM
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Originally Posted by antony1103 View Post
How much vacuum did you give it manually? Did you blow out the lines to see if you had any water inside. I've heard of the hubs staying engaged due to corrosion from water/condensation in the lines. Maybe you happened to give it just enough vacuum manually to break them free. Just a thought.
About 25 on the vacuum gauge. I'm gonna pull the lines and blow them out see it that does anything. I'll report back.
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Old 10-26-2018, 06:07 PM
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Put new actuators in and still the same issue. What I found out is its not the actuators is the transfer case that's staying engaged! I figured I could change the motor on the back of the transfer case, but this model doesn't have an external motor. Any ideas on this issue now??
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Old 10-29-2018, 10:48 AM
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Do you have the normal 2 speed case with 2H, 4H, and 4L, or do you have the 4A?

I would start with trying to shift the tcase with the switch and see what happens. You can also use Forscan to monitor what mode the tcase is supposed to be in. This might help narrow it down to a switch/electrical issue or a mechanical/shift motor issue.
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Old 10-29-2018, 08:18 PM
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Originally Posted by jp360cj View Post
Do you have the normal 2 speed case with 2H, 4H, and 4L, or do you have the 4A?

I would start with trying to shift the tcase with the switch and see what happens. You can also use Forscan to monitor what mode the tcase is supposed to be in. This might help narrow it down to a switch/electrical issue or a mechanical/shift motor issue.
Mine has 2H, AWD, 4H.
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Old 10-30-2018, 09:40 AM
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Can you tell if it's AWD or 4H?
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Old 10-30-2018, 06:26 PM
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Originally Posted by jp360cj View Post
Can you tell if it's AWD or 4H?
It seems to be in AWD. When I put it in 4H I can feel the difference.
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Old 11-01-2018, 09:12 PM
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Is it possible that the magnetic clutch is stuck engaged? Maybe a relay or something is stuck closed. I'm going to pull the wire connection apart at transfer case and see if that does anything.
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Old 11-02-2018, 09:35 AM
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Idk, I'm not familiar with how that tcase works.
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